Method of producing blasting cartridges capable of absorbing liquefied gases



Patented Nov. 13, 1923.

UNITED STATES PATENT OFFICE.

LEOPOLD LISSE, OF BEELIN, GERMANY.

METHOD OF PRODUCING BLASTING CARTRIDGES CAPABLE OF ABSOBBING LIQUEI'IED GASES.

No Drawing.

and of which the following is a specification.

The present invention relates to a method of manufacturing blasting cartridges .in which liquid air is used. as an oxidizing medium, and consists in shaping and uniting the carbonaceous and other explosive constituents so as-to form a caseless, porous cartridge body adapted to absorb the liquid air or oxygen necessary for its explosion.

In the manufacture of the cartridge a mixture is made out of soot or some other carbonaceous substance, an adhesive binding agent such as castor-sugar, resin, bran or the like, a ferment such as yeast or bicarbonate of soda, 3 and enough liquid to mak a paste. This paste is pressed into the desired shape and baked until a rigid porous body is obtained, the porosity being obtained by the action of the ferment. In

stead of forming complete cartridges, the

paste may b formed into discs, rings or rods which are subsequently. assembled so In cases when cheapness and rapidity of y manufacture are of consequence, the cartridge can be made of a carbonaceous substance which Is in itself porous, for instance sawdust peME the like, such substance be- 111g m e t g binding agent into a paste out of which the car 41%- rm rigid porous structures. The shapes ma be enclosed in a wrapper.

artridges of this kind of more'or less highly explosive character can also be made i 45 out of wood fibre, bast, wool, hemp cotton,

paper, jute, linen and like carbonaceous fibrous materials in torn, ground, spun, woven, twisted or braided form. Suitable round, angular or otherwise shaped bodies plete or in parts, are shaped and dried to Application filed July 19, 1820. Serial No. 397,552.

made out of these materials can be bundled together and tied with strings or the like, with or without adhesives, to form cartridges. Compressed'pieces of wood, plant materials, sawdust, wood-wool, various kinds of string or rope, either singly or bundled may be'used to make cartridges. Before or after the impregnation with liquid air, these materials may either be mixed with or impregnated with solutions of substances which, either whilein solution or when d increase or diminish the rapidity of the c arge. For instance, to reduce the sensitiveness of the charge, so as to prevent it from causing the explosion of coal-dust and fire-damp, an addition thereto of water, common salt, soap, sugar and the like will prove efi'ective. I claim 1. A method of manufacturing liquid air blasting cartridges consisting in shap ng and uniting the carbonaceous and other explosive constituents so as to form a'caseless,po"-

rous cartridge body capable of absorbing the liquid air or oxygen necessary for its explosion.

2. A method of manufacturing liquid air blasting cartridges consisting in adding to the porous carbonaceous and other explosiveconstituents an adhesive binding agent, and uniting and shaping such constituents capable of absorbing gen necessary for their explosion.

3. A method of manufacturing, liquid air blasting cartridges powdered carbonaceous substances, ,a means capable of'slowly evolving gases comprising a binding agent, and enough liquid to make a 'paste, shaping such paste into caseless cartridge elements, and baking such elements so as to form -rigid orous bodies capable of absorbing the hqui air" necessary for their explosion. I

4. A method of manufacturing liquid air blasting cartridges consisting in adding to consisting in "mixing" the carbonaceous explosive and other constituents a substance rendering the charge safe against reaction with coalust and firedamp, and then baking nd uniting the consorbing the liquid air necessary for their e1,-

stituents so as to form a caseless porous plosion. l0

cartridge body capable 'of absorbing the In testimony whereof I aflixed my signaliquid air necessary for its explosion. ture in the presence of two witnesses.

5 5. A method of manufacturing liquid air LEOPOLD LISSE.

blasting cartridges consisting in bundling lVitnessesz. together vegetable materials so as to form PETER S'mrrnm, caseless cartridge elements capable of ab- Farrz LAMTTEANRY. 

